1.

Give one chemical test to distinguish between CH3CH2NH2 and C6H5NH2.

Answer»

Azo dye test: Dissolve the compound in conc. HCl and ice-cold solution of HNO2 (NaNO2 + dil. HCI) and then treat it with an alkaline solution of 2-naphthol. Appearance of brilliant orange or red dye indicates aniline. 

Ethyl amine does not give dye test.



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